I also have a complete rig with the Canon 7D and Nautican housing, that you might be interested if you are starting, since as I said is a complete rig. The only think you would need to buy in separate would be the macro lens.

Let me know if you want the list for the 7D. If so, drop me an e-mail at info@adrianabasques.com
Will be easier to send the list via e-mail.